Improvement in stop-valves



C. JENKINS.

STOP VALVE.

Patented Aug.22,1876.'

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UNITED STATES PATENT 'OFFIGE CHARLES JENKINS, OF BOSTON, MASSACHUSETTS.

' IMPROVEMENT IN STOP-VALVES.

Specification forming part of Letters Patent No. 181,267, dated August22, 1876; application filed July 31, 1376.

To all whom it may concern:

Be it knownthat I, CHARLES JENKINS, of Boston, Massachusetts, haveinvented an Improvement in Valves, of which the following is aspecification:

pression-packing, all operating in combination with the guides of thegate.

In the drawing, Figure l is a vertical 1ongitudinal section, Fig. 2 is avertical transverse section, and Fig. 3 a vertical longitudinal section,of a valve embodying my invention.

A is the stem. B is the shell. 0 is the bonnet. D is the water-wayl e isthe metallic sea-t. f is the abutment. G is the gatea compositestructure composed of a casingpiece, it, on the valve-stem side of whichis a swivel, i, attaching it to the valve-stem. The diaphragm containingthe metallic seat 0 is preferably placed so that the seat shall be atright angles to the water-way D, and the abutment f is inclined acrossthe water-Way, so as to make a frustum of a wedge-shaped cavity,intersecting the water-way and forming the guides for the gate which isto close it. Inside the casing-piece h is placed a' ring ofcompression-packing, m, and inside of that a binding-piece, 1. Behindthe packing m is the metallic packing-piece, k, the back of which isinclined to correspond with thcabutment f.

The parts of the gate G being fitted together and attached to the stemA, placed in position, and the bonnet on, on revolving the stem to closethe water-way-the inclined back of the packing-piece it, coming incontact with the abutmentf, compresses the packing m on the seat 6perpendicularly to the seat.

Fig. 3 illustrates a valve with inclined valve-seats on each side thegate. It will be understood from what has been said above.

It will be seen that this valve'is simple, cheap, easily repaired,light, and effective.

I claim- 1. The combination, in'the gate of a straightway valve, of thecasing-piece h, packing m, packing-piece k, and binding-piece Z, all asand operating substantially as described.

2. The combination of the inclined abutment f, valve-seat e, packing m,and packingpiece It, moved and operated by the valvestem A,substantially as described.

CHARLES JENKINS.

Witnesses:

THos. WM. CLARKE, AnoLPH. J. OElTINGER.

